Telemecanique LC1 to Schneider TeSys D Cross Reference — Contactors & LRD Overloads

If your part number reads like LC1D0910 or LC1-D2510 — with the auxiliary contact count baked into the number — you’re holding a pre-2001 Telemecanique D2-series contactor, and the current Schneider TeSys D equivalent has a different, shorter number. The translation rule is simple once you know it: post-2001 TeSys D contactors include 1 NO + 1 NC auxiliary as standard, so the auxiliary digits dropped out of the part number. An LC1D0910 became an LC1D09 plus a coil-voltage code; the tables below run that conversion for the full amperage range, with the coil-code table alongside.

The catches are in the accessories, and they’re exactly what ships wrong when someone converts the number without the notes. Overloads: pre-2001 LR2 overload relays do not mount on TeSys D contactors — select the replacement from the LRD range (mapped below). Mechanical interlocks: the interlock design changed; a TeSys D cannot be mechanically interlocked to a D2, so reversing pairs must be replaced as a pair. Coil connections: the top-mounted A2 coil terminal is gone — the LAD4BB adapter restores a top A2 connection where panel wiring demands it. Suppressors: now a clip-on side module. Pneumatic timers and add-on auxiliary blocks carried over with renumbered references.

Run your old number through the tables, note the flagged accessories, and you have the complete modern bill of materials — or send us the old numbers and we’ll do the conversion, including the coil voltage decode.

TeSys D contactors and LRD overloads ship from stock in the common sizes, and we source obsolete D2-series originals when a like-for-like swap is the requirement.